'regularly-employed' is a compound formed from 'regularly' and 'employed.' 'Regularly' comes from 'regular,' which originates from Latin 'regularis,' meaning 'according to rule,' and 'employed' comes from Old French 'employer,' meaning 'to use' or 'to hire.'

'Regularly-employed' was formed in modern English by combining 'regularly' and 'employed' to describe someone who is employed on a regular basis.

Initially, it meant 'employed in a regular manner,' and it still retains this meaning today, referring to someone with stable, ongoing employment.